Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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129
FXUS66 KHNX 232208
AFDHNX

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
208 PM PST Wed Jan 23 2019

.SYNOPSIS...
High pressure along the U.S. West Coast will bring dry weather
and a day to day warming trend through the weekend. Areas of night
and morning fog will occur in the San Joaquin Valley through the
period.

&&

.DISCUSSION...The fog has dissipated in the Central Valley and
given way to mostly sunny skies. A few high clouds will continue
to move into the region from the northwest this afternoon. Later
this evening, northwest winds are expected to increase over
western and northern portions of our San Joaquin Valley
(or Fresno County northward) due to an upper-level disturbance;
we are thinking this could briefly prevent fog formation in these
areas for tonight/Thursday morning. Otherwise, patchy dense fog is
expected to redevelop later tonight in southern portions of the SJ
Valley, such as Hanford, Corcoran, and the 99 corridor from
around Selma to Delano. Short-term high resolution fog guidance
suggests little or no development; however, current surface
dewpoints are sufficiently high, even a bit warmer than tonight`s
forecast low temperatures.

Otherwise, expect temperatures to warm a couple of degrees each
day through the weekend as high pressure will continue to build
over our area. Nighttime/morning fog is expected until at least
the weekend, although another upper-level disturbance could
mitigate widespread dense fog development on Friday night into
Saturday morning.

Models continue to forecast a somewhat stronger upper-level
disturbance passing over central California and the Great Basin
early next week, or during Monday/Monday night. This feature
could be strong enough to bring increased clouds and gusty
northerly winds over the mountains and desert; however, we do not
anticipate precipitation with this system as any moisture will be
well to the east. The ridge of high pressure will rebuild along
the West Coast soon afterward. Thus, generally little change in
weather is expected for the first half of next week, and
temperatures will be mild, or a few degrees above average for late
January.

&&

.AVIATION...
Fog and mist forming late at night and early morning in the San
Joaquin Valley with areas of MVFR conditions and local IFR/LIFR
visibility, especially towards the south SJV 08Z-18z Friday.
Otherwise, VFR conditions will prevail over the central CA interior
during the next 24 hours.

&&

.AIR QUALITY ISSUES...
On Wednesday January 23 2019... Fireplace/Wood Stove Burning
Status is: No Burning Unless Registered in Fresno... Kings and
Merced Counties.
Further information is available at Valleyair.org

&&

.CERTAINTY...

The level of certainty for days 1 and 2 is high.
The level of certainty for days 3 through 7 is medium.

Certainty levels include low...medium...and high. Please visit
www.weather.gov/hnx/certainty.html for additional information
an/or to provide feedback.

&&

.HNX Watches/Warnings/Advisories...
NONE.

&&

$$

public/synopsis...BSO
avn/fw...MV

weather.gov/hanford



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